diff --git a/soundtrigger/2.1/Android.bp b/soundtrigger/2.1/Android.bp
new file mode 100644
index 0000000..ed1ec3d
--- /dev/null
+++ b/soundtrigger/2.1/Android.bp
@@ -0,0 +1,20 @@
+// This file is autogenerated by hidl-gen -Landroidbp.
+
+hidl_interface {
+    name: "android.hardware.soundtrigger@2.1",
+    root: "android.hardware",
+    vndk: {
+        enabled: true,
+    },
+    srcs: [
+        "ISoundTriggerHw.hal",
+        "ISoundTriggerHwCallback.hal",
+    ],
+    interfaces: [
+        "android.hardware.audio.common@2.0",
+        "android.hardware.soundtrigger@2.0",
+        "android.hidl.base@1.0",
+    ],
+    gen_java: false,
+}
+